Those are classic symptoms.
Check the obvious first.
Drop the carb bowls and check for debris at the bottom of the bowls. As you remove each bowl (instructional video on uTube) be careful not to spill/empty out the bowls, so you get a good read, on any foreign objects, submerged or floating around.
I bet debris is clogging one or both of the jets.
It only takes a tiny speck, to cause a rough running engine.
Last edited by Driftdown : 12-18-2017 at 10:56 PM.